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. 2017 Feb 1;185(3):172–184. doi: 10.1093/aje/kww196

Table 1.

Characteristics of Older Women in the Women's Health Initiative OPACH Study, by Accelerometer-Measured Sedentary Time (n = 1,297), 2012–2013a

Characteristic Quartile of Accelerometer-Measured Sedentary Time, hours/day P Value
<8.18 (n = 322) 8.18–9.23 (n = 326) 9.24–10.21 (n = 324) ≥10.22 (n = 325)
No. of Women % Mean (SD/SE) No. of Women % Mean (SD/SE) No. of Women % Mean (SD/SE) No. of Women % Mean (SD/SE) ANOVAb χ2 Testc GLMd
Age, yearse 77.8 (6.6) 78.9 (6.8) 79.6 (6.7) 80.4 (6.5) <0.01
Age group, years <0.01
 64–69 36 11.2 32 9.8 26 8.0 19 5.9
 70–74 71 22.1 66 20.3 62 19.1 46 14.2
 75–79 83 25.8 67 20.6 56 17.3 61 18.8
 80–84 84 26.1 78 23.9 93 28.7 110 33.9
 ≥85 48 14.9 83 25.5 87 26.9 89 27.4
Race/ethnicityf <0.01
 White 155 48.1 181 55.5 196 60.5 224 68.9
 African-American 167 51.9 145 44.5 128 39.5 101 31.1
Educationf 0.79
 Less than high school 14 4.4 9 2.8 9 2.8 12 3.7
 High school diploma 50 15.5 50 15.4 53 16.5 50 15.4
 Some college 107 33.2 126 38.9 124 38.5 129 39.8
 College graduate 151 46.9 139 42.9 136 42.2 133 41.1
Baseline marital statusf 0.48
 Married/living as married 190 59.2 194 59.9 183 56.5 177 54.6
 Widowed 46 14.3 55 17.0 56 17.3 68 21.0
 Divorced/separated 73 22.7 60 18.5 75 23.2 65 20.1
 Never married 12 3.7 15 4.6 10 3.1 14 4.3
Baseline smoking historyf 0.12
 Never smoked 170 53.1 183 56.3 172 54.1 169 52.8
 Past smoker 133 41.6 127 39.1 115 36.2 133 41.6
 Current smoker 17 5.3 15 4.6 31 9.8 18 5.6
Baseline alcohol consumptionf 0.81
 Nondrinker 40 12.6 37 11.4 35 10.8 40 12.3
 Past drinker 61 19.2 68 20.9 71 22.0 56 17.2
 Current drinker 217 68.2 220 67.7 217 67.2 229 70.5
Body mass indexg <0.01
 Underweight (<18.5) 6 1.9 3 0.9 4 1.2 3 0.9
 Normal weight (18.5–24.9) 125 38.9 106 33.0 96 29.8 65 20.4
 Overweight (≥25) 113 35.2 114 35.5 105 32.6 122 38.2
 Obese (≥30) 77 24.0 98 30.5 117 36.3 129 40.4
Self-rated health 0.07
 Excellent 42 13.6 22 7.0 25 8.2 25 8.0
 Very good 131 42.3 143 45.3 126 41.3 119 38.1
 Good 112 36.1 120 38.0 116 38.0 134 43.0
 Fair/poor 25 8.1 31 9.8 38 12.5 34 10.9
Current high blood pressureh 52 16.5 44 13.6 68 21.2 68 21.4 0.03
History of hypertension 252 78.3 263 80.7 268 82.7 261 80.3 0.56
History of use of hormone therapy 224 71.1 210 65.6 228 71.0 231 72.2 0.26
History of chronic diseases
 CHD 14 4.4 16 4.9 19 5.9 30 9.2 0.04
 Stroke 10 3.1 4 1.2 16 4.9 11 3.4 0.06
 Diabetes 49 15.2 71 21.8 71 21.9 76 23.4 0.05
 Cancer 43 13.4 67 20.6 68 21.0 63 19.4 0.05
 Any of the above 104 32.3 135 41.4 141 43.5 140 43.1 0.01
Experienced a fall in the past 12 months 74 23.9 106 34.2 102 32.3 99 31.3 0.03
Physical performance scoree 8.5 (2.2) 8.2 (2.4) 7.9 (2.7) 7.4 (2.6) <0.01
Accelerometer-measured MVPA, hours/dayi,j 1.24 [0.02] 0.86 [0.02] 0.68 [0.02] 0.39 [0.02] <0.01
Self-reported sedentary time, hours/daye 7.2 (3.6) 8.3 (4.1) 9.2 (4.4) 10.0 (4.2) <0.01
LTL, kilobasese 6.70 (0.59) 6.68 (0.60) 6.56 (0.60) 6.54 (0.60) <0.01
Age- and race-adjusted LTL, kilobasesj 6.66 [0.03] 6.68 [0.03] 6.60 [0.03] 6.62 [0.03] 0.20

Abbreviations: ANOVA, analysis of variance; CHD, coronary heart disease; GLM, general linear model; MVPA, moderate- to vigorous-intensity physical activity; OPACH, Objective Physical Activity and Cardiovascular Health; LTL, leukocyte telomere length; SD, standard deviation; SE, standard error.

a All characteristics represent current status, unless otherwise noted. Sample sizes for variables in each column do not sum to totals because of missing data.

bP value was calculated using ANOVA.

cP value was calculated using a χ2 test.

dP value was calculated using a GLM.

e Values are expressed as mean (standard deviation).

f Determined at the 1993–1998 baseline visit.

g Weight (kg)/height (m)2.

h Systolic blood pressure ≥140 mm Hg or diastolic blood pressure ≥90 mm Hg.

i Adjusted for hours of wear time.

j Values are expressed as mean [standard error].